.mrk{
    font-size:x-large;
    color: crimson;

}
.prs_css{
    font-size:x-large;
    color: crimson;
}
.sbj_css{
    font-size:x-large;
    color: crimson;
}

.top_css{
    font-size:large;
    color: red;
}
table{
    border-collapse: collapse;
    width: 250px;
}
tr,th,td{
    border:2px solid black;
}
caption{
    font-size: large;
    font-weight: bold;
}

#snav{
    display: none;
}